The reason he was killed was because the main rotor hit his head. It did so because it wasn't following safety precautions. None of that has anything to do with his formal education.
The worlds best engineers with Billions of dollars in multi-year budgets, who know about and exposed to a lot of knowledge about "complexities of building machines"...even they fall short.
[Space Shuttle Columbia disaster](https://en.m.wikipedia.org/wiki/Space_Shuttle_Columbia_disas...)
Spot the difference?
The engineers of Columbia are probably still alive after that monumental fuck up. Did anyone question their credentials? Education? What high school they went to? What modules they took on their mech engineering classes?
The hypocrisy of attributing a failure to a lack of education is morally inept at best, and disingenuos at worst.
But my fear is more base. My fear is that the man is from a third world country and that your answer might be drawing an already unfair conclusion from that fact. I hope my fears are wrong and you are just being objectively pessimistic.
Being a high school drop-out is the reason he was killed. If he had been to a 4 year course in Mechanical engineering, he would be exposed to a lot of knowledge about the complexities of building machines